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High-temperature exposure alters the community structure and functional features of the intestinal microbiota in Shaoxing ducks (Anas platyrhynchos)

文献类型： 外文期刊

作者： Tian, Yong 1 ; Li, Guoqin 1 ; Chen, Li 1 ; Bu, Xingchen 1 ; Shen, Junda 1 ; Tao, Zhengrong 1 ; Zeng, Tao 1 ; Du, Xue 1 ; Lu, 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Anim Husb & Vet Sci, Hangzhou 310021, Peoples R China

2.Minist Agr China, Key Lab Informat Traceabil Agr Prod, Hangzhou 310021, Peoples R China

关键词： gut microbiota; high temperature; community structure; functional pathway; Shaoxing duck

期刊名称：POULTRY SCIENCE （ 影响因子：3.352； 五年影响因子：3.679 ）

ISSN：

年卷期： 2020 年 99 卷 5 期

页码：

收录情况： SCI

摘要： The gut microbiome is a complex ecosystem that contributes to host nutrition and health. However, our current knowledge of the relationship between ambient temperature and gut microbiota of poultry is still limited. The objective of the present study was to characterize the intestinal microbiota of ducks exposed to high ambient temperature. Sixty 60-day-old Shaoxing ducks were allocated to control and heattreated groups. The ducks in the control group were kept at 25 degrees C, and the ducks in the heat treatment group were raised at 30-40 degrees C, which simulated the temperature change of day and night in summer. After 15 D, the intestinal contents of the duodenum, jejunum, and ileum were obtained from 6 ducks of each group. GenomicDNA was extracted and amplified based on the V4-V5 hypervariable region of 16S rRNA. The results showed that Firmicutes was the dominant bacterial phylum with the highest abundance in the contents of the small intestine of ducks, and the relative abundance of the phylum Firmicutes in all 3 intestinal segments was increased by high temperature. At the genus level, Lactobacillus was found to be the most dominant bacterial genus across 3 gut segments, and its abundance was increased in ducks under heat treatment. Compared with the corresponding intestine segment of control ducks, a total of 36 genera in the duodenum, 19 genera in the jejunum, and 6 genera in the ileum of heat-treated ducks were found to be significantly different in the abundance (linear discriminant analysis score .3.0, P<0.05). Functional prediction of gut microbiota revealed that high temperature caused changes in the abundance of metabolism and transcription-related pathways. It is noteworthy that most of the altered pathways are related to metabolism. In conclusion, high temperature induced remarkable taxonomic changes in the gut microbiome of ducks, which might be related to the negative effects of high temperature in ducks. Our present study provided an important theoretical ground for high-temperature intervention.

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